.four-column-image
  = f.hidden_field :list_order
  = f.hidden_field :row_type
  - [ [0, 1], [2, 3], [4, 5] ].each_with_index do |columns, i|
    .inner4{ class: i == 2 ? 'omega' : '' }
      - columns.each do |position|
        .tn-tc-piece.tn-tc-asset-field.inner6{ class: cycle('', 'omega') }
          = f.fields_for :pieces, f.object.pieces.select{ |p| p.position == position } do |piece|
            = render 'tenon/tenon_content/piece_types/form/image', f: piece, position: piece.object.position
  .spacer
